work further on interface, need to add gate programming options : half done, more options on the way
storage of user patterns, working on SD card solutionput LEDS on stuff (what would be complete without them)
tidy up code (losing a few milliseconds here and there)
add another CV out (because 1 just isnt enough)
consider variable pattern lengths (at the moment, if sequence length is set to 16 for example, everything plays to 16, gates and notes, may be nice to offer the option of running some tracks at 8, some at 16 and so on)
option of Note Length (although im not sure how important this is)

been a busy couple of days!
stay tuned for more updates!__________________Richard_ Last edited by bubzy on Tue Sep 18, 2012 7:49 pm; edited 1 time in total

What kind of interface are you using? Do you have the bank-o-knobs like most sequencers, or are you doing something stranger since it's an Arduino? Does it resemble the 808?

These questions brought to you by my recent work investigating the 808 kick and trigger circuitry.

I've been thinking about something that moderately emulates the 808 interface, without being slavish about it. Lots of things to think about there though. I think the hardest part IMO is how to deal with the relatively small number of pins on a standard UNO. I have a Mega, but at twice the cost, it doesn't seem like the best platform to design for if i want other people to get anything out of it.

That's an awesome way to do the display. I was thinking in terms of buttons with LEDs and next to LEDs, but that solves the problem pretty neatly. I think I would want two pots/rotaries that could run independently (top row, bottom row), but using the LCD that way definitely saves a LOT of trouble.

Edit: to clarify, I was thinking in terms of 16 voices (bottom row) and 16 positions (top row), selecting the voice on the bottom row and then programming the notes for that on the top.

I have a 2x20 or 22 display, that would give me a few more positions to play with extra information to one side too. Hm......

update : programming patterns for cv out. the video is filmed in vertical mode again :/ sorry about that
ive noticed that because the sequencer is plugged into USB on my laptop that the cv suffers a bit(fluctuates when laptop is working). if i had any forethought at all i would have powered it externally, but im not willing to listen to my dull voice again for 7 minutes

if anyone is watching this thread with interest..... thank you __________________Richard_

Good stuff. Given me a lot to think about, and I still love that display.

My plans along these lines definitely include external power, since I hope to be able to put something into a rack eventually. As far as it goes, while I will do development with a "real" arduino, the final product will most likely use an ATMega chip on a protoboard instead, that's what I did with the Arduino port I did of the MTS-100 MIDI->CV.

Ok so a small update and a request for an opinion or two, after talking to vlad in the chat today he suggested making a pattern option so that a song could be made on the sequncer, ive decided this could be implemented without too much heartache(my brain is screaming EEPROM!!!) so my question to you guys is, would this be a valuable addition to a sequencer? Thanks __________________Richard_

So I'm going to respond so you know I'm still reading, but I am not clear on the distinctions between the different types of sequencers....

As for EEPROM etc, how much memory are you using? When you download your sketch, are you getting "5000 of 6000 bytes" or more like 5000 of 10,000 bytes"? I don't remember the memory sizes of the various models of Arduino, but that should tell you whether you have headroom or not.

Oh, im using external memory so thats no issue. The idea is to program say 6x16 step "patterns" then choose what order they play in, kinda 303 style. So you program say 1,1,2,2,3,3,4,3,5,4,4,6 and it plays those patterns in that order. Btw im using 24lc256 memory.__________________Richard_

I made something similar for a college project and I used layers for a couple of outputs, eg pitch and filter. It outputted MIDI so I used CC numbers. Are the two Cv outputs on your for this?_________________http://soundcloud.com/for-mash-get-ash

lets take Note CV1, in this "song" the sequencer would take pattern 10, and play it through, then take pattern 12 and play it, then 14, then 10 again. this is a similar method to older hardware and software (i used propellerheads rebirth a lot)
the same rule applies to Note CV2, Gate 1, Gate 2. using this method, its possible to build up multiple tracks and a performance.

anyway, still early days lots of work to do and my wife has me down the garden building a fence for our new dog.....__________________Richard_

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